Killing Them Softly

While most Americans celebrated Thanksgiving with family on Thursday, Brad Pitt spent his holiday with zombies on the set of World War Z in London.

"I didn't know it was Thanksgiving until like midday. Until [the] afternoon," he told PEOPLE in an interview for the coming issue.

"When you're overseas, they don't celebrate it in England. And [Angelina Jolie] and some of the kids are overseas in Cambodia this week, working on the [The Maddox Jolie-Pitt Foundation] there," he said. "It completely escaped me until someone brought me some English pumpkin pie."